package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.dto.PasswordEditDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordEditFailedException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;
import java.util.Objects;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在  自定义异常
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // 前端密码明文加密
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (Objects.equals(employee.getStatus(), StatusConstant.DISABLE)) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     * @return
     */
    public void save(EmployeeDTO employeeDTO) {
        // DTO转实体类
        Employee employee = new Employee();
        // 对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, employee);
        // 设置账号状态  1正常  0表示锁定
        employee.setStatus(StatusConstant.ENABLE); // 正常 StatusConstant.ENABLE=1 常量类

        // 设置密码  默认123456  md5加密 PasswordConstant.DEFAULT_PASSWORD=123456 常量引用
        String password = DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes());
        employee.setPassword(password);

/*        // 创建时间 自动填充
        employee.setCreateTime(LocalDateTime.now());
        // 修改时间
        employee.setUpdateTime(LocalDateTime.now());

        // 设置当前记录创建人id 和修改人id
        // 从线程中获取empId
        employee.setCreateUser(BaseContext.getCurrentId());
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.insert(employee);
    }

    /**
     * 员工分页查询
     *
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult page(EmployeePageQueryDTO employeePageQueryDTO) {
        // 开始分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(), employeePageQueryDTO.getPageSize());
        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        //        处理page
        // 记录数  和  返回结果Employee对象
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 启用或禁用员工账号
     *
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
//        Employee employee = new Employee();
        // 创建实体对象
        Employee employee = Employee.builder()
                .status(status)
                .id(id).build();
        employeeMapper.update(employee);
    }

    /**
     * 修改员工信息
     *
     * @param employeeDTO
     */
    @Override
    public void editEmployee(EmployeeDTO employeeDTO) {
        // DTO转实体类
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);
/*        employee.setUpdateTime(LocalDateTime.now());
        // 获取修改人ID 自动填充
        employee.setUpdateUser(BaseContext.getCurrentId());*/
        employeeMapper.update(employee);
    }

    @Override
    public Employee selectById(Long id) {
        Employee employee = employeeMapper.selectById(id);
        // 对查询的密码再md5加密的基础上  返回前端的数据再隐藏
        employee.setPassword("*****");
        return employee;
    }

    /**
     * 修改密码
     *
     * @param passwordEditDTO
     */
    @Override
    public void editPassword(PasswordEditDTO passwordEditDTO) {
        // 通过id查询员工账号
        Long id = BaseContext.getCurrentId();
        Employee employee = employeeMapper.selectById(id);
        // 核对旧密码
        String oldPassWord = passwordEditDTO.getOldPassword();
        String mdOldPassWord = DigestUtils.md5DigestAsHex(oldPassWord.getBytes());
        if (!mdOldPassWord.equals(employee.getPassword())) {
            throw new PasswordEditFailedException(MessageConstant.PASSWORD_EDIT_FAILED);
        }
        // md5生成新密码
        String mdNewPassWord = DigestUtils.md5DigestAsHex(passwordEditDTO.getNewPassword().getBytes());
        // 赋值
        employee.setPassword(mdNewPassWord);
        employeeMapper.update(employee);
    }

}
